My 2003 1.8T is making a very odd sound. As I drive and the engine RPM’s climb, my engine and/or turbo make the sound of a supercharger. It is not a defining sound but it is loud enough to hear clearly. I have inspected the engine visually and I have not found any obvious cause.

I have 53,000 miles on the car, and I have been religious with maintenance and care of it. I drive it hard and run 91 or higher in it at all times. The sound started Saturday PM and it is getting a little louder (or I am listening for it more) each day. I have not noticed any loss of power, boots or performance in the car, just the noise.

What could be the cause of my new sounding engine? I love the sound of a well tuned supercharger, just not coming for a turbocharged engine.

I think Turbo bearing....maybe related to oil sludge and improper cooling/lubrication? That is covered under extended warranty. Do you know any mechanics that can help you diagnose the issue? To save on the dealer over charging since you are out of warranty....

Maybe time for timing belt, since that is do at 60K anyway...can a water pump make those sounds?

JR, your issue sounds like the timing belt tensioner (but you replaced all that so most likely not), but it could also just be your turbos. When your engine is cold (until the oil gets warmed up) your turbos will always be noticeable louder which is why you should push your car until the oil gets warmed up. So you will hear a lot more noise during that period.

Hmm...sorry to hear that Randy. Hopefully it'll get worked out. I was hoping it'd be the same thing 'cause then you wouldn't have to worry so much about it. (I'm not that picky and in summers I don't hear anything )

EDIT: Just read your post over on CB5 and I'm praying it's not your turbo going out. If it is: go with a KO4 then have a beer with Mac&Cheese and lament that fact that you have a fast car but no money.